CG-5重力仪弹簧形变对测量的影响  

Effect of the Spring Deformation of CG -5 Gravimeter on Measurements

作　　者：张松堂 陆银龙 王应建 

机构地区：[1]第一测绘导航基地,天津300140

出　　处：《测绘科学与工程》2014年第6期18-21,共4页Geomatics Science and Engineering

摘　　要：CG-5是无磁熔凝石英弹簧重力仪，精度高、性能稳定，漂移曲线基本呈线性。本文利用CG-5重力仪的长期观测数据，分析了弹簧应力松弛效应对CG-5重力仪的零点漂移、弹簧弹性滞后效应对观测精度以及弹簧蠕变特性对仪器寿命的影响；同时，通过分析静态试验数据，验证了CG-5重力仪读数包含有量级较小的非线性二次项。CG - 5 is a kind of non - magnetic fused quartz spring gravimeter of high precision and good stability, and the drift curve is basically linear. In this paper, the influences of the spring stress relaxation effect on zero drift, the spring elastic hysteresis effect on measurement precision, and the spring creeping characteristic on the service life of gravimeter are analyzed with the long - term measured data of CG - 5. It is also validated that a non - linear quadratic item of smaller order of magnitude is contained in the gravimeter reading of the CG -5 by analyzing static experimental data.

关 键 词：CG-5重力仪 弹簧特性 应力松弛 弹性滞后 蠕变 零点漂移 漂移残差 

分 类 号：P228[天文地球—大地测量学与测量工程]